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A new CO gas sensor of perovskite-type oxide, semiconducting La-doped BaTiO 3 PTCR ceramics was studied. It is capable of detecting carbon monoxide gas in the concentration range of 1.0% in the high temperature NTCR region near and above the T maxairP (175-400 o C) by means of higher barrier potential of PTCR effect. However, there is only a little...
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